Hood for emery-wheels



Pa tented Juno 6, I899.

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0 KONBAD HUODFDB EMEBY WHEELS.

FFICE.

PATENT OTTO KONRAD, or RIPON, WISCONSIN.

HOOD FOR EM ERY-WHEELS.

SPECIFICATION forming part of Letters Patent No. 626,544, dated June 6, 1899. Application filed ADI-114:, 1899. Serial No. 711,688. (No model.)

To all whom, it may concern-.-

Be it known that I, OTTO KONRAD, a citizen of the United States, residing at Ripon, in the county of Fond du Lac and State of Wisconsin, have invented new and useful Improvements in Hoods for Emery-\Vheels, of which the following is a specification.

In the use of emery-wheels and other grinding-wheels which revolve at a high rate of speed there is great danger to the operator or grinder from particles which break off and fly from the wheel. Sometimes the whole wheel breaks and sometimes large portions break off, andthe grinder who is obliged to stand directly in front of the wheel is in great danger of injury from pieces which fly oif from the wheel toward him.

The object of my invention is to provide a rigid hood or casing that shall support an auxiliary sliding or revolving hood operating automatically to thoroughly screen the grinder from any flying particles.

I am aware that hoods have heretofore been constructed which partially protected the grinder, but as it is necessary to have an opening so that a portion of the wheel shall be uncovered and in View these former hoods only protected the upper portion of his body View.

or revolving hood D, extending over the top of the wheel A. The casing C is provided with an opening 0 above the table T, and the front of the hood D when in its normal position terminates at the top of the opening 0. The interior of the hood D is provided with aseries of teeth (l d (1, extending across the top, and flanges F F, extending downwardly upon each side below the periphery of the wheel A. The hood D is arranged to revolve or slide upon the hood 0 either in lubricated ways or upon ball or roller bearings provided for this purpose. WVhen the wheel A becomes broken or a portion flies off tangentially, it strikes against one or more of the teeth cl (Z d and instantly impels the hood D forward to the dotted position I) above the table T, immediately closing the opening 0, before which the grinder stands. The grinder is thereby protected from injury and can at any time raise the hood D to its former position. The stop a on each side serves to arrest the forward movement of the hood D before it strikes the table T.

I do not wish to confine my invention to any particular form of teeth or projectionsol cl cl or to any particular ways or bearings for the revolving hood D. I have shown in the drawings roller-bearin gs G G between the easing C- and the hood D, and the ears E E attached to the flanges F F, supporting small wheels 6 e, which travel on top of the casing O. This form of construction provides rollerbearings on each side of the hood 0, the hood C acting as a track upon which the hood D travels. The wheel A is attached to and revolves with the shaft a, which turns in boxes supported by a frame in the ordinary way. It is obvious that the revolving hood D may also be supported by the frame and arranged to revolve for the purpose of closing the opening 0.

The bracket B is provided with an upright slot J and a set-screw I for vertical adjustment of the hood 0. Slots K K are also provided in the base of thebracket B, through which the bolts L L pass to fasten the bracket to any bed or support. Means for lateral adjustment is thereby afiorded, and the hood C may at any time be changed vertically or I00 horizontally to conform to the periphery of the emery-wheel A.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an emery-wheel guard, the combination with a rigid casing having an opening through which the grinder operates, of a hood which slides on the rigid casing, said hood beingprovided with interior teeth or. projections, which projections are adapted to be struck by pieces fiyin g from the wheel, where by the hoodis automatically slid forward to close the opening through which the grinder operates, substantially as described.

2. In an emery-wheel guard, the combination with a suitably-supported casing having an opening through which the grinder operates, of a hood which slides on the casing, said hood being provided with interior teeth or projections, which latter are adapted to be struck by pieces flying from the wheel and thereby automatically force the hood forward to close the space through which the grinder operates and antifrictionwollers for the s1idin g hood, substantially as described.

3. In an emery-Wheel guard, the combination with a suitably-supported casing having an opening through which the grinder operates, of an exterior sliding casing, provided with inwardly-extending teeth and adapted in its movement to close the opening in the said casing, rollers interposed between the rigid casing and the sliding hood, upwardlyextending ears attached to the sliding hood and carrying wheels adapted to travel on top of'the casing, substantially as described.

4. In an emery-wheel guard, the combination of an arched inclosing casing, which is open at front, means for adjusting the easing upward, means for supporting an emerywheel beneath said casing, and a sliding hood movable on said casing and provided with projections on its inner surface, which are adapted to be struck by pieces flying from the emery-wheel and thereby to automatically move the hood forward and close the space through which the grinder operates, substantially as described.

5. In an emery-wheel guard, the combination of an arched inclosing casing, which is open at front, means for adjusting the casing vertically, a bracket for supporting the easing which latter is capable of being adjusted backward and forward and a sliding hood movable on said casing and provided with projections on its inner surface, which are adapted to be struck by pieces flying from the emery-wheel and thereby automatically to slide the hood forward and close the space through which the grinder operates, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

OTTO KONRAD.

Witnesses:

A. O. J ELLEFF, C. H. WAKEFIELD. 

